C#

<firstlevel>
   <secondlevel>
      <value1>1</value1>
      <value2>2</value2>
   </secondlevel>
</firstlevel>

section("firstlevel")
{


}

openSection("firstlevel");
.
.
closeSection();

XmlWriterSettings settings = new XmlWriterSettings();
XmlWriter writer = XmlWriter.Create(SettingsFile, settings);

private void openSection(string sect)
{
   writer.WriteStartElement(sect);
}

private void closeSection()
{
   writer.WriteEndElement(); 
}

public partial class Form1 : Form
    {
        List<button> buttons = new List<button>();
        int counter = 0;
        int maxButtons = 10;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try 
	        {
                if (counter < maxButtons)
                {
                    Point loc = new Point();

                    buttons.Add(new Button());

                    loc.X = ClientRectangle.X + (counter * 50);
                    loc.Y = ClientRectangle.Y + (counter * 50);

                    buttons[counter].Location = loc;
                    buttons[counter].Name = "Input name with some variable?";
                    buttons[counter].Click += new EventHandler(ButtonClickEvent1);
                    this.Controls.Add(buttons[counter]);

                    counter++;
                }
                else
                {
                    throw(new Exception("Too many buttons"));
                }
	        }   
	        catch (Exception ex)
        	{
                MessageBox.Show("A system error ocurred:\n" + ex.Message, "System Error", 
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
	        }
            
        }

        void ButtonClickEvent1(object sender, EventArgs e)
        { 
            //Insert code here, I don't know how to create evnt dynamically.
            //Thus, I'd have to write a limited amount of events and could only have the user create
            //this many butons.
        }
        
        void ButtonClickEvent2(object sender, EventArgs e)
        {
            //Insert code here, I don't know how to create evnt dynamically.
            //Thus, I'd have to write a limited amount of events and could only have the user create
            //this many butons.
        }
    }</button></button>

private void tbxUpper_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Return)
            {
                TextBox tbx = (TextBox)sender;
                SelectNextControl(tbx, true, true, true, true);
            }
        }

unsafe delegate void PacketHandler(byte* data, int length);

struct Packet
{
    int type;
    int len;
    PacketHandler func;
}

void CreatePacket()
{
    Packet packet = new Packet
    {
        type = 0x73,
        len = 11,
        func = AuthOK // You only need to specify the name of the function
        // Alternative notation: func = new PacketHandler(AuthOK);
    };
}

unsafe void PacketProcessor(Packet packet)
{
    byte* data = GetPacketData(packet.type);
    packet.func(data, packet.len);
}

unsafe void AuthOK(byte* data, int len) // Matches the PacketHandler delegate signature
{
    // handle packet type 0x73
}